<?php

class App_Sitemap_Virtual
{
    const SOURCE_VIRTUAL = 'virtual';

    protected static function _prepareVirtual(&$sitemap)
    {
        foreach ($sitemap as &$page) {
            $page['source'] = static::SOURCE_VIRTUAL;

            if (!empty($page['sub']) && is_array($page['sub'])) {
                self::_prepareVirtualLinks($page['sub'], $page);
            }

            if (!empty($page['rightSub']) && is_array($page['rightSub'])) {
                self::_prepareVirtualLinks($page['rightSub'], $page);
            }
        }
    }

    protected static function _prepareVirtualLinks(array &$links, array $page)
    {
        $filterParams = 3;
        $adminPageQuery = Qs_Array::get($page, 'adminPageQuery');
        $fullAlias = null;
        foreach ($links as &$link) {
            if (empty($link['fullAlias'])) {
                if (!$adminPageQuery) {
                    if (!is_array($page['pageQuery'])
                        || !is_array($page['pageQuery'][1])
                        || !array_key_exists('type', $page['pageQuery'][1])
                    ) {
                        throw new Qs_Exception('Can not determine block type.');
                    }
                    $type = $page['pageQuery'][1]['type'];
                    if (false !== strpos($type, '\\')) {
                        $type .= 'Admin\\';
                    } else {
                        $type .= 'Admin_';
                    }
                    $adminPageQuery = [null, ['type' => $type], null];
                } else if (is_array($adminPageQuery) && count($adminPageQuery) <= $filterParams) {
                    $emptyParams = $filterParams - count($adminPageQuery);
                    if ($emptyParams > 0) {
                        $adminPageQuery = array_merge($adminPageQuery, array_fill(0, $emptyParams, null));
                    }
                } else {
                    throw new Qs_Exception('Wrong "adminPageQuery"');
                }

                if (!$fullAlias) {
                    $params = $adminPageQuery;
                    $params[] = 'fullAlias';
                    $fullAlias = call_user_func_array('Qs_SiteMap::findFirst', $params);
                }

                $link['fullAlias'] = $fullAlias;
                if (!empty($link['urlParams'])) {
                    $link['fullAlias'] .= '?' . http_build_query($link['urlParams']);
                }
            }

            if (!isset($link['alias'])) {
                $link['alias'] = basename($link['fullAlias']);
            }

            $link['source'] = static::SOURCE_VIRTUAL;
        }

        return true;
    }

    public static function prepare(&$sitemap)
    {
        /** @var $virtualSitemap Zend_Config */
        if (null === ($virtualSitemap = Qs_Application::getConfig('sitemap')->get('virtualSitemap'))) {
            return false;
        }
        $virtualSitemap = $virtualSitemap->toArray();

        self::_prepareVirtual($virtualSitemap);

        foreach ($virtualSitemap as $item) {
            self::_prepareItem($sitemap, $item);
        }

        self::_callDynamicHandlers($sitemap);

        return true;
    }

    public static function _prepareItem(&$sitemap, &$item)
    {
        if (!isset($item['pageQuery'])) {
            $sitemap [] = $item;
            return true;
        }

        if (!self::_getSuMode()) {
            $item['pageQuery'][0]['system'] = 'n';
        }
        if (false === ($pages = call_user_func_array('Qs_SiteMap::find', $item['pageQuery']))) {
            return true;
        }

        foreach ($pages as $page) {
            $name = self::_alias2PageSub($page['fullAlias']);
            if (isset($item['sub'])) {
                foreach ($item['sub'] as $subData) {
                    if (isset($subData['targetPageQuery'])) {
                        if (false !== ($targetPage = call_user_func_array('Qs_SiteMap::findFirst', $subData['targetPageQuery']))) {
                            foreach (['menuTitle', 'fullAlias', 'url', 'source'] as $field) {
                                if (array_key_exists($field, $targetPage) && !array_key_exists($field, $subData)) {
                                    $subData[$field] = $targetPage[$field];
                                }
                            }
                        }
                        unset($subData['targetPageQuery']);
                    }
                    Qs_Array::set($sitemap, $name . '[' . $subData['fullAlias'] . ']', $subData);
                }
            }
            $name = self::_alias2PageRightSub($page['fullAlias']);
            if (isset($item['rightSub'])) {
                foreach ($item['rightSub'] as $subData) {
                    Qs_Array::set($sitemap, $name . '[' . $subData['fullAlias'] . ']', $subData);
                }
            }
            if (isset($item['dynamicHandler'])) {
                $name = self::_alias2Page($page['fullAlias']);
                Qs_Array::set($sitemap, $name . '[dynamicHandler]', $item['dynamicHandler']);
            }
        }
        return true;
    }

    protected static function _callDynamicHandlers(&$sitemap)
    {
        foreach ($sitemap as &$item) {
            if (isset($item['dynamicHandler'])) {
                $class = array_shift($item['dynamicHandler']);
                $method = array_shift($item['dynamicHandler']);
                $arguments = array_merge([$item], $item['dynamicHandler']);
                $obj = new $class();
                $obj->$method($item);
                unset($class);
            }
            if (isset($item['sub'])) {
                self::_callDynamicHandlers($item['sub']);
            }
        }
    }

    protected static function _alias2PageRightSub($alias)
    {
        $parts = explode('/', $alias);
        $name = array_shift($parts);
        while (($alias = array_shift($parts))) {
            $name .= '[sub][' . $alias . ']';
        }
        return $name . '[rightSub]';
    }

    protected function _alias2Page($alias)
    {
        $parts = explode('/', $alias);
        $name = array_shift($parts);
        while (($alias = array_shift($parts))) {
            $name .= '[sub][' . $alias . ']';
        }
        return $name;
    }

    protected static function _alias2PageSub($alias)
    {
        $parts = explode('/', $alias);
        $name = array_shift($parts);
        while (($alias = array_shift($parts))) {
            $name .= '[sub][' . $alias . ']';
        }
        return $name . '[sub]';
    }

    protected static function _getSuMode()
    {
        if (is_callable('App_Admin_Auth::getInstance')) {
            return App_Admin_Auth::getInstance()->getSuMode();
        }
        return false;
    }
}